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21. 2/n = 4/30 *

5
15
25
35

22. 18/n = 21/28 *

20
24
28
32

V. Solve the problem below.

23. If 6 men can plow a field in 2 days, How long will 3 men do it? *

Iyong sagot

24. If 3 eggs cost P8. 00, how much will 12 eggs cost? *

Iyong sagot

25. The sum of the two numbers is 215. If the ratio is 2:3 , find the larger number.

Iyong sagot



Sagot :

Answer:

We will use Chain Rule to solve this question.

According to Chain Rule, the work efficiency remains constant.

WWF×T = Constant

Here W = Work Done, WF = Workforce, T = Time.

Let the number of days needed be 'x'.

Applying Chain Rule,

W15×6=Wx×10

Or, x=9 Days (Answer)